Painted Rocks Campground
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Painted Rocks Campground clear sky chart from 2005-11-06 to 2024-03-06.

This page is a summary of past forecasts. Even though it's based only on forecasts, some people use these pages as clue to a site's climate. But climate data based on actual observation should be preferred (if you can find it!).

Cloud, Transparency and Seeing forecasts are summarized individually. But because good observing conditions require a combination of minimum cloud cover, transparency and seeing, the individual forecast summaries can be difficult to interpret. The observing conditions section counts the combinations of conditions needed for common types of astronomical observation.

Observing Conditions

The following tables count the occurrence of the combinations of forecast and darkness conditions needed for different observations. Conditions are rated by by what percentage of the hours the observation would likely be attempted are usable.
Observation TypeMinimum conditions for hour to be usableOut of hours
Clear of CloudsTransparencySeeingSky Brightness
Planetary:50%(no limit)Average(no limit)Nighttime Hours
Deep Sky:70%Average(no limit)5.9Nighttime Hours
CCD Imaging:70%Below AveragePoor(no limit)Nighttime Hours

Percentages are of nighttime hours per month, or per year, when a particular observing conditions was met. Deep Sky percentages never exceed 50% because the moon is up half the time. Deep sky percentages are much lower for charts at high latitudes because of fewer dark hours in the summer.

Overall

PlanetaryData
Pts
Deep Sky
Max 60%
Data
Pts
Both Planetary and Deep Sky
Max 60%
Data
Pts
Either Planetary or Deep SkyData
Pts
CCD ImagingData
Pts
Night
61%
24055
23%
80006
21%
23971
65%
23971
32%
45955

By Month

MonthDays of MonthPlanetaryData
Pts
Deep Sky
Max 60%
Data
Pts
Both Planetary and Deep Sky
Max 60%
Data
Pts
Either Planetary or Deep SkyData
Pts
CCD ImagingData
Pts
January1st to 10thNight
55%
748
14%
4047
16%
736
58%
736
13%
2674
January11th to 20thNight
53%
757
12%
4099
17%
740
58%
740
14%
2874
January21st to endNight
55%
825
14%
4455
20%
814
58%
814
15%
2754
February1st to 10thNight
52%
760
19%
2470
18%
760
57%
760
26%
1568
February11th to 20thNight
51%
740
20%
2298
18%
740
56%
740
28%
1427
February21st to endNight
51%
628
22%
1884
19%
628
57%
628
29%
1179
March1st to 10thNight
48%
742
21%
2091
17%
742
54%
742
28%
1342
March11th to 20thNight
59%
720
24%
1980
20%
720
63%
720
38%
1173
March21st to endNight
49%
792
19%
2178
12%
792
54%
792
29%
1420
April1st to 10thNight
48%
720
20%
1980
14%
720
53%
720
32%
1226
April11th to 20thNight
50%
536
25%
1657
17%
536
58%
536
32%
960
April21st to endNight
54%
540
25%
1620
17%
540
59%
540
34%
929
May1st to 10thNight
52%
540
23%
1620
17%
540
56%
540
30%
972
May11th to 20thNight
61%
531
24%
1595
19%
531
64%
531
40%
869
May21st to endNight
59%
582
20%
1746
18%
582
62%
582
36%
987
June1st to 10thNight
66%
540
28%
1620
22%
540
73%
540
52%
778
June11th to 20thNight
60%
540
28%
1620
23%
540
68%
540
54%
736
June21st to endNight
70%
540
27%
1620
26%
540
74%
540
59%
742
July1st to 10thNight
72%
525
23%
1575
21%
525
75%
525
50%
772
July11th to 20thNight
70%
522
21%
1566
19%
522
72%
522
37%
880
July21st to endNight
73%
591
21%
1674
20%
558
74%
558
35%
980
August1st to 10thNight
73%
537
25%
1602
19%
534
76%
534
44%
835
August11th to 20thNight
76%
534
31%
1602
25%
534
79%
534
48%
807
August21st to endNight
73%
594
35%
1810
32%
594
75%
594
51%
862
September1st to 10thNight
80%
696
34%
1956
27%
696
84%
696
59%
936
September11th to 20thNight
73%
720
35%
1980
28%
720
77%
720
56%
1000
September21st to endNight
72%
720
37%
1980
28%
720
77%
720
57%
985
October1st to 10thNight
64%
720
28%
2052
21%
720
70%
720
43%
1119
October11th to 20thNight
70%
720
34%
2160
28%
720
76%
720
48%
1089
October21st to endNight
65%
792
36%
2376
29%
792
73%
792
47%
1206
November1st to 10thNight
64%
740
31%
2377
28%
740
69%
740
41%
1224
November11th to 20thNight
65%
760
30%
2470
29%
760
68%
760
40%
1298
November21st to endNight
61%
760
27%
2470
27%
760
64%
760
34%
1374
December1st to 10thNight
61%
760
22%
2470
22%
760
64%
760
31%
1446
December11th to 20thNight
53%
759
19%
2904
17%
758
55%
758
20%
1817
December21st to endNight
43%
824
9%
4402
13%
817
46%
817
11%
2715

Individual Forecasts

The length of each colored bar in the "occurrence of each Forecast" column is proportional to the number of times the chart forecast that color. The percentages are of the total number of hours per month, or per year, with a particular forecast. The colors as the same as those used in clear sky charts.

Note: Transparency probabilities are only counted for those hours that have 30% or less cloud cover. Seeing probabilities are only counted for those hours that have 80% or less cloud cover. If that's too tricky, try Observing Conditions instead.

Overall

Occurrence of each ForecastData
Points
Cloud CoverDay
46%36%5%35%5%5%7%51%
78995
Night
5%7%36%5%345%5%7%50%
80594
TransparencyDay
31%6%11%18%21%14%
78721
Night
31%7%11%20%19%11%
80389
SeeingDay
7%12%26%32%18%5%
13838
Night
7%5%19%41%24%3
24100

By Month

Percentage Cloud Cover SW (2006-)
Color Meanings:
Overcast 90% covered 80% covered 70% covered 60% covered 50% covered 40% covered 30% covered 20% covered 10% covered Clear
MonthDays in MonthOccurrence of each ForecastData
Points
January1st to 10thDay
316%6%11%8%45%5%5%6%32%
2858
11th to 20thDay
5%14%5%12%9%45%46%7%30%
2860
21st to endDay
6%12%5%7%6%35%5%6%10%38%
3146
February1st to 10thDay
49%5%10%5%35%5%6%9%40%
1710
11th to 20thDay
6%10%48%6%3446%7%41%
1767
21st to endDay
5%9%47%7%4445%7%45%
1570
March1st to 10thDay
411%47%5%345%5%7%44%
1984
11th to 20thDay
5%8%36%6%45%5%6%8%44%
1980
21st to endDay
5%10%49%7%46%5%6%7%37%
2178
April1st to 10thDay
5%7%36%5%46%5%5%8%46%
1980
11th to 20thDay
5%7%37%6%45%5%46%48%
2247
21st to endDay
6%7%36%5%35%5%5%6%51%
2340
May1st to 10thDay
5%5%26%5%46%6%6%7%46%
2340
11th to 20thDay
5%6%246%45%5%6%8%49%
2301
21st to endDay
5%5%345%46%6%6%8%48%
2530
June1st to 10thDay
23134345%5%8%62%
2340
11th to 20thDay
4312324346%67%
2340
21st to endDay
2111323445%74%
2340
July1st to 10thDay
23135%35%5%5%8%61%
2340
11th to 20thDay
3425%435%7%6%8%54%
2340
21st to endDay
44245%36%7%7%10%48%
2545
August1st to 10thDay
3314445%5%7%9%55%
2328
11th to 20thDay
32145%3445%7%63%
2299
21st to endDay
33144245%6%8%59%
2544
September1st to 10thDay
321232445%6%67%
2000
11th to 20thDay
2323425%445%67%
1980
21st to endDay
4312323336%70%
1980
October1st to 10thDay
7%42442445%6%59%
1906
11th to 20thDay
5%313322445%67%
1800
21st to endDay
5%5%2432345%6%62%
1980
November1st to 10thDay
5%6%3442446%6%55%
1697
11th to 20thDay
6%6%2442445%7%55%
1710
21st to endDay
47%46%5%34447%51%
1710
December1st to 10thDay
5%9%46%5%35%45%6%48%
1710
11th to 20thDay
5%8%410%7%46%5%7%8%36%
2169
21st to endDay
410%48%6%45%5%7%10%37%
3146
January1st to 10thNight
412%7%12%7%45%45%8%34%
4097
11th to 20thNight
6%12%5%10%8%45%6%6%7%31%
4110
21st to endNight
6%12%5%7%7%45%5%6%10%34%
4521
February1st to 10thNight
48%48%6%45%5%6%7%44%
2470
11th to 20thNight
49%48%435%45%7%46%
2297
21st to endNight
410%48%5%35%5%5%9%43%
1884
March1st to 10thNight
5%10%47%5%45%5%6%7%43%
2091
11th to 20thNight
5%8%36%4345%5%8%50%
1980
21st to endNight
7%8%36%5%45%5%47%46%
2178
April1st to 10thNight
6%7%35%5%35%6%6%7%48%
1980
11th to 20thNight
6%6%45%5%36%5%5%7%49%
1657
21st to endNight
6%5%345%435%5%7%52%
1620
May1st to 10thNight
7%7%25%5%46%5%6%7%46%
1620
11th to 20thNight
45%245%3446%7%55%
1594
21st to endNight
46%25%435%5%5%7%52%
1746
June1st to 10thNight
321343445%8%64%
1620
11th to 20thNight
3213424345%70%
1620
21st to endNight
2213324446%69%
1620
July1st to 10thNight
1224425%5%6%8%61%
1620
11th to 20thNight
3326%6%5%6%6%6%9%49%
1620
21st to endNight
4435%5%46%7%9%10%44%
1773
August1st to 10thNight
3313435%6%8%8%55%
1611
11th to 20thNight
23145%345%7%8%58%
1602
21st to endNight
22134346%5%7%62%
1810
September1st to 10thNight
321322345%6%69%
1956
11th to 20thNight
3214433346%67%
1980
21st to endNight
5%322323335%70%
1980
October1st to 10thNight
6%42342445%7%59%
2052
11th to 20thNight
5%324323445%66%
2160
21st to endNight
45%1332345%6%63%
2376
November1st to 10thNight
35%245%2445%8%58%
2377
11th to 20thNight
5%5%2433345%7%58%
2470
21st to endNight
48%45%5%2445%7%52%
2470
December1st to 10thNight
6%9%26%434447%50%
2470
11th to 20thNight
8%10%47%5%35%5%7%7%40%
3041
21st to endNight
5%11%410%7%46%6%7%7%34%
4521

Transparency (when cloud cover <= 30%)
Color Meanings:
Too cloudy to forecast Poor Below Average Average Above average Transparent
MonthDays in MonthOccurrence of each ForecastData
Points
January1st to 10thDay
50%10%13%17%10%
2859
11th to 20thDay
53%8%14%15%8%1
2860
21st to endDay
40%10%21%17%10%3
3146
February1st to 10thDay
41%9%17%20%11%2
1710
11th to 20thDay
41%8%11%23%16%2
1776
21st to endDay
38%7%11%25%17%2
1570
March1st to 10thDay
38%7%11%23%19%2
1984
11th to 20thDay
35%7%13%27%13%5%
1980
21st to endDay
43%8%12%20%13%3
2178
April1st to 10thDay
35%7%11%20%19%7%
1980
11th to 20thDay
36%7%10%19%22%7%
2250
21st to endDay
32%7%10%21%25%5%
2340
May1st to 10thDay
33%7%10%17%25%8%
2340
11th to 20thDay
30%6%11%19%25%8%
2304
21st to endDay
30%7%12%18%27%6%
2530
June1st to 10thDay
19%5%8%15%33%20%
2340
11th to 20thDay
19%46%11%28%33%
2340
21st to endDay
12%35%9%23%48%
2340
July1st to 10thDay
21%47%11%17%40%
2276
11th to 20thDay
24%6%11%14%19%26%
2271
21st to endDay
26%9%12%14%17%21%
2404
August1st to 10thDay
23%6%10%15%19%27%
2313
11th to 20thDay
20%5%8%12%19%36%
2299
21st to endDay
22%5%8%14%27%24%
2544
September1st to 10thDay
17%49%11%23%36%
2000
11th to 20thDay
20%48%16%24%28%
1980
21st to endDay
19%35%15%33%25%
1980
October1st to 10thDay
26%5%8%18%29%14%
1906
11th to 20thDay
20%46%21%36%12%
1800
21st to endDay
23%49%31%26%7%
1980
November1st to 10thDay
29%5%11%23%23%9%
1697
11th to 20thDay
28%6%11%28%24%4
1710
21st to endDay
32%5%13%24%21%4
1710
December1st to 10thDay
35%7%17%25%12%5%
1710
11th to 20thDay
44%8%13%19%15%1
2168
21st to endDay
40%8%16%14%18%3
3146
January1st to 10thNight
48%8%13%18%12%1
4097
11th to 20thNight
50%10%16%15%7%2
4110
21st to endNight
42%10%20%18%9%2
4521
February1st to 10thNight
39%8%14%26%10%3
2470
11th to 20thNight
37%7%11%24%19%3
2298
21st to endNight
38%6%12%24%17%3
1884
March1st to 10thNight
37%7%10%28%16%1
2091
11th to 20thNight
31%5%12%30%19%4
1980
21st to endNight
37%8%13%24%15%4
2178
April1st to 10thNight
33%8%10%21%20%8%
1980
11th to 20thNight
32%6%12%20%24%6%
1657
21st to endNight
30%7%12%23%24%4
1620
May1st to 10thNight
34%6%10%19%25%6%
1620
11th to 20thNight
26%7%10%20%28%9%
1595
21st to endNight
28%7%11%24%23%7%
1746
June1st to 10thNight
17%5%7%20%34%17%
1620
11th to 20thNight
15%49%12%26%34%
1620
21st to endNight
15%36%8%21%47%
1620
July1st to 10thNight
18%6%9%10%17%40%
1575
11th to 20thNight
28%8%10%14%15%27%
1566
21st to endNight
29%8%14%14%16%18%
1674
August1st to 10thNight
21%8%14%17%15%24%
1602
11th to 20thNight
20%6%10%14%15%35%
1602
21st to endNight
18%5%9%17%23%28%
1810
September1st to 10thNight
15%48%14%22%37%
1956
11th to 20thNight
18%48%19%20%31%
1980
21st to endNight
18%35%15%31%28%
1980
October1st to 10thNight
24%6%8%17%31%14%
2052
11th to 20thNight
21%5%6%19%38%11%
2160
21st to endNight
21%5%9%29%29%7%
2376
November1st to 10thNight
23%6%10%27%25%9%
2377
11th to 20thNight
26%6%11%29%24%5%
2470
21st to endNight
32%410%26%24%4
2470
December1st to 10thNight
34%6%13%29%14%4
2470
11th to 20thNight
41%7%13%25%13%1
3041
21st to endNight
44%9%14%14%18%1
4521

Seeing (when cloud cover <= 80%)
Color Meanings:
Too cloudy to forecast Bad 1/5 Poor 2/5 Average 3/5 Good 4/5 Excellent 5/5
MonthDays in MonthOccurrence of each ForecastData
Points
January1st to 10thDay
15%11%25%31%14%4
270
11th to 20thDay
9%8%29%33%17%4
270
21st to endDay
5%7%27%36%20%4
297
February1st to 10thDay
418%30%33%14%1
270
11th to 20thDay
11%15%33%28%13%2
372
21st to endDay
7%18%36%30%8%1
382
March1st to 10thDay
12%19%30%26%11%2
441
11th to 20thDay
11%16%31%27%12%3
420
21st to endDay
14%23%32%23%8%
462
April1st to 10thDay
11%21%27%24%15%3
420
11th to 20thDay
11%25%31%23%9%2
412
21st to endDay
12%24%25%23%15%2
420
May1st to 10thDay
7%20%33%28%9%2
423
11th to 20thDay
8%12%29%29%16%6%
448
21st to endDay
9%15%24%30%17%4
485
June1st to 10thDay
410%32%30%20%4
450
11th to 20thDay
6%13%31%27%18%4
450
21st to endDay
38%31%39%15%4
450
July1st to 10thDay
2325%40%26%4
446
11th to 20thDay
2223%42%25%5%
444
21st to endDay
3317%40%29%9%
487
August1st to 10thDay
4422%41%22%6%
447
11th to 20thDay
46%23%34%27%6%
437
21st to endDay
4326%34%25%8%
495
September1st to 10thDay
46%23%30%26%10%
450
11th to 20thDay
39%27%34%19%8%
450
21st to endDay
6%10%23%29%24%9%
450
October1st to 10thDay
9%11%23%29%19%10%
376
11th to 20thDay
310%19%27%25%15%
270
21st to endDay
7%9%22%34%24%4
297
November1st to 10thDay
9%14%22%23%23%9%
270
11th to 20thDay
48%23%35%22%8%
270
21st to endDay
8%8%19%29%28%7%
270
December1st to 10thDay
6%10%24%38%16%7%
270
11th to 20thDay
6%12%21%40%18%3
270
21st to endDay
9%11%21%41%16%2
297
January1st to 10thNight
9%6%20%39%21%6%
760
11th to 20thNight
8%5%22%40%20%5%
760
21st to endNight
11%5%19%43%19%4
836
February1st to 10thNight
8%6%24%46%13%3
760
11th to 20thNight
8%6%27%42%14%2
744
21st to endNight
9%6%26%45%13%1
628
March1st to 10thNight
9%8%28%40%14%1
742
11th to 20thNight
8%7%20%42%22%2
720
21st to endNight
10%9%26%41%13%1
792
April1st to 10thNight
10%10%27%35%16%1
720
11th to 20thNight
8%12%25%40%14%1
536
21st to endNight
9%10%23%37%20%1
540
May1st to 10thNight
10%9%23%40%18%1
540
11th to 20thNight
7%5%20%39%25%4
531
21st to endNight
7%8%20%37%25%3
584
June1st to 10thNight
45%20%43%26%1
540
11th to 20thNight
38%23%42%23%1
540
21st to endNight
2321%45%28%1
540
July1st to 10thNight
3117%34%42%3
525
11th to 20thNight
4112%40%39%4
522
21st to endNight
5%18%37%45%4
591
August1st to 10thNight
4114%46%34%2
537
11th to 20thNight
3111%49%34%2
534
21st to endNight
3213%40%37%4
594
September1st to 10thNight
429%37%41%7%
696
11th to 20thNight
2316%38%35%6%
720
21st to endNight
6%315%32%35%9%
720
October1st to 10thNight
8%420%38%27%3
720
11th to 20thNight
7%314%43%28%5%
720
21st to endNight
7%419%38%27%5%
792
November1st to 10thNight
5%6%19%40%25%4
740
11th to 20thNight
8%318%45%22%4
760
21st to endNight
7%6%18%40%22%6%
760
December1st to 10thNight
10%417%47%18%4
760
11th to 20thNight
14%420%41%21%1
760
21st to endNight
15%6%21%41%14%2
836
Page generated at 2024-03-03 04:28:57. Version ac07

Copyright © 2024 Attilla Danko.


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